Filter



Nov. 3, 1942.

I c. E. HUNzlKER Filed May 1'?, A19:59 3 Sheets-Sheet l Muni li'Il y/20 .un @n1 d; @y

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if l! lill 1NvENToR. CHARLES HUNZIKE/ BY ATTORNEYS Nay. 3, 11942.` c. E. HuNzlKR FILTER Filed May 17. 1939 5 Sheets-Sheet 3 Egg.' 1o.

INVEN'IOR LssEHUNzII:

7 A(im:

Biff# ATTORNEYS.

Patented Nov'. 3, 1942 UNITED STATES PATENT CFFIC.

FIITR Charles E. Hunziker, Paterson, N. j'.

l Application May 17, 1939, Serial No.` 274,119'

(Cl. Zlib-e195) 9 Claims.

This invention relates to filters, and refers more particularly to a universal filter capable of being used for a variety of purposes.

Various filtering operations, such as clarification, recovery, i. e., separation of residues from the liquid, and simple or thorough washing, require different arrangements for the flow of the liquid, and heretofore it was considered necessary to use different filters consisting of differently constructed lter plates and filter frames for each of these operations.

An object of the present invention is the provision of a single filter which is so constructed that it can be conveniently and easily adapted to carry out different operations requiring different flows of liquid through the lter.

Another object of the present invention is the provision of a filter consisting of a number of lter plates and/orA lter frames which are so constructed that the character and the mode of operation of the filter may be easily and conveniently changed b-y the user, so that the saine filter can be adequately and effectively employed for the purpose of carrying out a variety of filtering operations, such as clarification, recovery and washing.

Other objects of the present invention will become apparent in the course of the following l specification.

The objects of the present invention may be realized through the provision of a lter, each of the filter frames and/or filter plates of which is provided with passages or holes whichare so disposed that a combination of some of these passages and holes may be satisfactorily used for carrying out any one of the required operations, suitable means 1oeing provided for closing those of the passages and holes which are not required for a particular operatic-n. 1

Thus, in accordance with the present invention, there are provided universal filter plates and/or universal filter frames for the purpose of eliminating the necessity of using differently coni structed filter frames and/ or filter platesfor difstructed in accordance with the principles of the present invention;

Figure 2 shows thel'ter plate side elevation,

looking in the direction of arrows 2-2 of Figure l Figure 3 is a partial cross-section along the lines 3--3 of Figure 1 on a larger scale;

AFigure 4 is a partial cross-section along the lines 4 4 of Figure 1; l

Figure 5 is a partial cross-section along the line 5-5 of Figure l; i

Figure 6 shows a hollow filter frame iii front elevation with some parts broken off Figure 7 is partly a section and partly a side elevation along the lines 'l-l olf Figure;

Figure 8v is a `side elevational view showing Va filter press which includes 4the filter plates and filter frames of Figures l to 7;

Figure 9 is an end elevation along the line 9-9 of Figure 8;l

Figure 10 is a diagrammatic front viewY of a filter plate illustrating the operation of the plate in the course of a recovery operation;

Figure l1 is a section through some of the plates and frames constituting a filter press, along the lines H-ll of Figure 10'; it illustrates the flow of the liquid in the course of a recovery operation;

Figure 12 is similar to Figure l0' andl illustrates a filter `plate in the course of a Washing operation;

Figure 13 is a section through filter plates and frames along the lines l3-l3 of Figure 12 and illustrates the flow of the liquid in the course of the washing operation;

Figure 14 is similar to Figures 10 and 12 and illustrates a filter plate inr the course of a clarification operation;

Figure 15 is`V a section throughnlter plates and frames alongthe lines l 5,-15 of Figure 14 and illustrates the flow of the liquid in the course of the clariiication operation;

Figure 16 is similar to Figures lOJ 12, and 14 and illustrates a iter plate in the courseV of a thorough waslfin'g;- and Figure 17' is a section through filter plates and frames along the lines I`1-l`1 of Figure 16 and illustrates the now of the liquid in the course of the thorough Washing.

The lter plate 20 shown in the drawings comprises an outer substantially rectangular frame portion 2| and handles 22 and 23 situated on opposite sides of the frame portion 2 l, and, preferably, integral therewith.

The handles 22 and 2'3 may be of any suitable form and are used for maintaining the plates '2li' upon 'the handle supports 24 and' 25 consti'- tuting a part of the iilter frame 26, which is shown in Figures 8 and 9.

As shown in Figures l, 8, 4, and 5, the central portion 21 of each iilter plate 20 includes a plurality of pyramidal projections or bosses 23, which are separated from each o-ther preferably by horizontal channels 29 and vertical channels 36.

Obviously, the channels 29 and 39 may extend in any suitable direction.

Each of the plates comprises four ports or passages 3|, 32, 33 and 34 situated at the four corner portions of the plate.

As shown more clearly in Figures 1 and 4, the port 32 extending transversely through the plate 29 is in communication with the substantially flat and narrow opening or passage 35 which is drilled into the plate 2! and which communicates with the central portion 21 of the plate by the tapped or threaded holes 35, 31, 38 and 39. As shown in Figure 4, the flat opening 35 extends in the direction of the plate 26 while the port 32 and the tapped holes 36 to 39 extend transversely across the plate 29.

The port 3| is in communication with a similar flat opening 46 which communicates with the central portion 21 of the plate 2E! by means of the tapped holes 4|, 42, 43, and 44.

The port 34 communicates with a similar flat opening which is in communication with the central portion 21 of the plate 23 by the tapped holes 46, 41, 48 and 49.

As shown in Figures 1 and 3, the port 33 is in communication with a fiat opening 56, which is in communication With the central portion 21 of the plate 20 by means of the tapped holes 5|, 52, 53, and 54. The port 33 is also in communication with a iiat opening or hole (Figures 1 and 2) which extends across the frame portion 2| of the plate 26 and is enclosed by an open delivery vent 56.

That portion of the lter plate 29 which is situated closely to the port 33 is provided with a downwardly extending extension piece 51 which carries the delivery Vent 56 as well as another open delivery vent 58 situated underneath the delivery vent 58. A substantially at passage 59 extends through the extension piece 51 and is in communication with the tapped holes 66, El, and 62 which are provided in the central portion 21 of the plate 26 substantially closely to the tapped holes 5| and 54.

As indicated in Figures 8 and 9, each of the delivery vents 56 carries a pet cock 63, while each of the delivery vents 58 carries a pet cock 54.

The cocks 63 are normally closed and the pas- 'i sages or vents 56 are used for the so-called visible closed discharge by taking the liquid from these passages back into the passages or vents 55 by means of a pipe connection and sight glasses. Y

The iilter press also comprises a number of hollow, substantialy rectangular filter frames 65, shown in Figures 6 and 7. The frames 65 are provided with handles 66 and 61, which maintain the frames upon the supports 24 and 25 (Figures 8 and 9).

Each of the frames is provided with four ports, which are in alignment with the ports 3| to 34 of the plates 29 and which, for simplicitys sake, are designated by the same numerals in the drawings. The port 3| of a frame 65 is in communication with the hollow interior 69 of the frame by three tapped holes 69, 19 and 1|. The

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rport 32 is in communication with similar tapped 75 holes 12, 13 and 14. The port 33 is in communication with similar tapped holes 15, 16 and 11, while the port 34 is in communication with the tapped holes 18, 19 and 86.

The general assembly of the lter press consisting of iilter plates 20, lter frames 65 and nterposed filter cloths 95 (Figures 11, 13, 15 and 17), is illustrated in Figures 8 and 9 of the drawings. The plates 26 and the frames 65 are carried by supports 24 and 25, which are carried by the columns or legs 6| and 82 of the frame 26. The columns 8| also carry an end head 83 provided with four valves 84, two of which are shown in Figure 8, and each of which communicates with a separate one of the ports 3| to 34.

The iilter press is also provided with a movable head carrying four valves 86, 81, 86, and 89, shown in Figure 9. The valve 66 communicates with the port 3|; the valve 81 communicates with the port 32; the valve 88 communicates with the port 33; while the valve 89 is in communication with the port 34.

The movable head 85 is carried by rollers 90 upon the supports 24 and 25 and is moved toward and away from the end head 83 by a hand wheel 9| connected with a threaded rod 92 supported in a sleeve 93. The hand wheel 9| is also connected with a substantially round member 94 which is adapted to receive the end of a crowbar or a lever used to increase the pressure of the head 85.

The described plates 26 and the frames 65 of the lter press are used in conjunction with any suitable plugs or set screws, which may be screwed into any one of the described tapped holes for the purpose of closing these holes and thus diverting the 110W of the liquid.

Various modes of operating the lter are described hereinafter. A lter is permanently set for each operation and in order to adapt it for another operation, it is necessary to withdraw the plates and frames and open or plug in the various holes by hand.

Figures 10 and 11 are diagrams illustrating the l use and the operation of the filter plates 20 and filter frames 65 when the lter press is used for recovery, namely, for separating a residue from a liquid. The liquid may be introduced through one of the valves 84 (Figure 8) into the port or passage 3|. As indicated in Figures 10 and 11, the tapped holes 4| to 44 of the plates 20, communicating with the port 3| are plugged in or closed, while the tapped holes 69, 16 and 1| of the filter frames 65 are open, so that the liquid can ow into the interior of the hollow frames 65. In the course of this ow, the liquid will pass through the lter cloths 95 which are situated between each of the plates 29 and the adjacent frame 65.

The residue 96 is deposited upon the lter cloths 95. The tapped holes 15, 16, and 11 of the frames 65, communicating with the port 33 are closed, While the tapped holes 5| to 54 oi the plates 20, which communicate with the same port 33 are open (Figure 10), so that the liquid will ow again through the lter cloths 95 and through the tapped holes 5| to 54 into the port or passage 33. The liquid may be removed through the openings 55 communicating by the vents 56 with the valves 63, shown in Figures 8 and 9.

When the press filter is to be used for clarification, the liquid may be caused to flow from the port or passage 34 intothe port or passage 32. This operation `is not illustrated in the drawings. In the course of this operation the tapped holes 13, 1&9 and 8l) of the iilter frames 65 and the tapped holes Se, 31 and 38 of the filter plates 20 are open, while all the other tapped holes are closed.

The liquid is then introduced through the corresponding valve 84 and flows through the passage or` port 34. Since the tapped holes 4B to 4'9 of the filter plates 2i) are closed, the liquid ywill not be able to pass therethrough. However, since the tapped holes 155, 'liand 8i) of the frames 65 are open, the liquid will pass into the interior of the hollow frames 65 and will fill this space. It will pass through the open tapped holes 3, 31, 38 and 39 of these plates into the port or passage 32, being removed from the iilter press through the valve 86 (Figures 8 and 9).

The simple washing may be carried out in the same direction as that of the iiltration flow.

Figures l2 and 13 illustrate a preferred mode of regulating the flow of the liquid when a thorough washing` of a filter caire is required. After the iiltration process has been carried out by the flow of the liquid from the passagel or port 34 to the passage or port 32, the thorough washing is carried out by introducing the liquid into the passage or port 3l. At that time the tapped holes di to 441 of some of the lter plates 2d are open. As shown in Figure 13, the arrangement issuch that a filter plate 2Q having open tapped holes M to ibi is followed by a filter plate the tapped holes 4i to ifi of which are closed, while the tapped holes 4l to M of the next lter plate are again open. All the tapped holes of the iilter frames t5 situated between the filter plates te are closed.

Filter plates 2d having open tapped holes di to 44 have no other open holes, while the intermediate filter plates 2@ the tapped holes 4I to M of which are closed, have open tapped holes 5i to 54, while all other tapped holes of these plates areclosed.

As shown in Figure 13, the liquid owing through the port 3| will then iicw through the open Vtapped holes di to lili and passing through the filter cloths Q5 ivill be introduced into the interiors of the frames G5, which are lled with filter cakes 91. The liquid williiow` through these cakes and will pass through other filter cloths 95 into the opened tapped holes 5l to 54 and will flow through the passages 5e into the passage or port 33, being removed therefrom through the openings 55, the delivery vent 55 and the valves 53.

Figures 14 and l5 illustrate the use of the filter press for clariiication, recovery, ltration or simple washing, wherein the liquid is introduced into the passage 3l through the corresponding valve 85%. The tapped holes 4! to 44 of the plates 2i! which normally communicate with the passage 3i are closed, while the tapped holes 69, 1li, and 1I provided in the frames E5 are open, so that the liquid will flow through the lastnamed holes into the interior of the frames 55` depositing the filtrate residue 95 upon the side surfaces of the filter cloths 95.

All the other tapped holes of the filter frames 65 are closed, While only the tapped holes E0, iii and E2 of the filter plates 2F) are open. Therefore, the liquid will iiow through the filter cloths 95 and into the tapped holes 6d, 6l and 62 and the passage 59 being removed from the filter press through the delivery vent 58 and the cocks 54 (Figures 8 and 9).

Figures 16 and 17 show the use of the lter press for a thorough washing, wherein open flow delivery is utilized. The liquid is introduced through the corresponding valve B4 into the passage 3|. As shown in the diagram of Figure 17, every second lter plate 2li is provided with open tapped holes il to 44, while the tapped holes 4! to Mof every intermediate plate 2li are closed. The liquid is therefore caused to iiowthrough the open tapped holes il to 44 and through the filter cloths 95 into the interior of the filter plates 65 which are iilled with filter cakes 91.

' shown by way of example and many other methf ods of flow may be used in connection with the described filter.

Furthermore, the structures above described are subject to wide variation and modification without departing from the scope or intent of the invention, all of which Variations and modiiications are to be included within the scope of the present invention.

What is claimed is:

1. A filter press, comprising, in combination, a filter plate and a lter frame adjacent to the filter plate, said filter plate having formed therein a plurality of `transverse ports, separate passagescornmunicating with said ports, and transverse holes communicating with said passages; said lter frame having formed therein a plurality of transverse ports which are in alinement with the ports of the iiiter frame and constitute continuations thereof, and holes communicating with said ports; at least some of said holes being adapted to be closed to vary the flow ci the liquid through said plate and frame.

2. In a lter press, a substantially rectangular lter plate having formed therein a transverse port in each of the corners thereof, separate passages communicating with said ports, and transverse holes communicating with said Y passages and adapted to be closed to vary the flow of a liquid through the press.

` 3. In a lter press, a substantially rectangular filter plate having a frame portion and a central portion; and a plurality of projections carried by said central portion; said iilter plate having formed therein a part in each of the corners thereof extending transversely through the frame portion of the plate, separate passages extending in the direction of the plate and communicating with said ports, and holes formed in the central portion of said plate and extending transversely thereto, said holes communicating with said passages and being adapted to be closed to vary the flow of a liquid through the press.

transversely thereto, said holes communicating with said passages and being adapted to be closed to vary the ow of a liquid through the press, at least one of said ports being situated close to the bottom of the plate.

5. In a lter press, a substantially rectangular lter plate having a frame portion and a central portion; and a plurality of projections carried by said central portion; said iilter plate having formed therein a port in each of the corners thereof extending transversely through the frame portion of the plate, separate passages extending in the direction of the plate and communicating with said ports, another passage formed in the frame portion of said plate and extending from an edge thereof to one of said ports, and holes formed in the central portion of said plate and extending transversely thereto, said holes communicating with the rst-mentioned passages and being adapted to be closed to vary the flow of a liquid through the press.

6. In a lter press, a lter plate comprising a frame portion having a plurality of transverse ports formed therein, a central portion having a plurality of projections, and an extension portion situated adjacent one of said ports and having two separate delivery vents, said lter plate having separate passages formed therein which extend in the direction of the plate and communicate with said ports, another passage formed in the plate and extending from one of said delivery vents to the adjacent port, still another passage formed in said plate and extending from the other one of said delivery vents to the central portion of the plate, and holes formed in the central portion of said plate and extending transversely thereto, said holes communicating with the Erst-mentioned passages and the last-mentioned passage and being adapted to be closed to vary the flow of a liquid through the press.

7. In a lter press, a substantially rectangular filter plate comprising a frame portion having four transverse ports formed therein and situated adjacent the corners of the plate, a central portion having a plurality of projections, grooves being formed between said projections, an extension portion situated adjacent one of the corners of the plate and having two separate delivery vents, and lateral supports situated on opposite sides of said plate for supporting said plate within the filter press, said lter plate having separate passages formed therein which extend in the direction of the plate and communicate with said ports, another passage formed in the plate and extending from one of said delivery vents to the adjacent port, still another passage formed in said plate and extending from the other one of said delivery vents to the central portion of the plate, and holes formed in the central portion of said plate and extending transversely thereto, said holes communicating with the rst-mentioned passages and the last-mentioned passage and being adapted to be closed to vary the flow of a liquid through the press.

8. A filter press, comprising, in combination, a plurality of filter plates and lter frames having hollow interiors and interposed between said filter plates, said filter plates and said filter frames having transverse intercommunicatng ports formed therein constituting a plurality of separate passages extending through the press, holes formed in said lter frames and communicating with said ports and the interiors of said frames, other passages formed in said lter plates and communicating with said ports, and holes formed in said filter plates and communicating with the second-mentioned passages, the holes of the press being adapted to be closed in various combinations to vary the flow of a liquid through the press.

9. A lter press, comprising, in combination, a plurality of lter plates and lter frames having hollow interiors and interposed between said lter plates, each of said filter plates and lter frames having four transverse ports formed therein, each of said ports being in alignment with the corresponding ports of the other lter plates and lter frames when said plates and frames are placed one next to the other to form four separate passages extending through the press, holes formed in said filter frames and communicating with said ports and the interiors of said frames, other passages formed in said lter plates and communicating with said ports; each of said filter plates having a separate extension portion situated adjacent one of said ports and having two separate delivery vents, a passage formed in said extension portion and extending from one of said delivery vents to the adjacent port, another passage formed in said extension portion and extending from the other one of said delivery vents into the plate, and holes formed in said iilter plates and communicating with the second-mentioned passages and the last-mentioned passage, the holes of the press being adapted to be closed in various combinations to vary the ow of a liquid through the press, cocks carried by said delivery vents, means supporting said filter plates and lter frames, and means pressing said filter plates and filter frames against each other, the last-mentioned means including means for introducing a liquid into any one of the first-mentioned passages and for removing it therefrom.

CHAS. E. HUNZIKER. 

